When "werror" is set to True, scons build will complains about compilation failure of some boost "multi-array" test case. This causes recently unit-tests failures. So I set "werror" back to False before someone who has the knowledge fixes the problem.

Add Boomer AMG as a new preconditioner
Can be used by .setPreconditioner(SolverOptions.BOOMERAMG)
and the following parallel coarsening method can be
used together with Boomer AMG preconditioner:
.setCoarsening(SolverOptions.CIJP_FIXED_RANDOM_COARSENING)
.setCoarsening(SolverOptions.CIJP_COARSENING)
.setCoarsening(SolverOptions.FALGOUT_COARSENING)
.setCoarsening(SolverOptions.PMIS_COARSENING)
.setCoarsening(SolverOptions.HMIS_COARSENING)
Note that Boomer AMG is only available when MPI is enabled.

escript now supports out-of-tree builds.
All build and test files are now created under a user-definable build_dir
directory.
This also fixes issue 291.
Removed most svn:ignore props since they are no longer required.

-New VisIt simulation control interface in weipa (uses VisIt's simv2)
-Rewrote restarts.py to be a more generic data manager for restarts and exports
-Removed weipa python file since the functionality is now handled by restarts.py